Marlstone Rock Formation
English Early Jurassic geological formation with ironstone
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The Marlstone Rock Formation is a geological formation in England. It dates to the Early Jurassic, it consists of "Sandy, shell-fragmental and ooidal ferruginous limestone interbedded with ferruginous calcareous sandstone, and generally subordinate ferruginous mudstone beds", with ironstone.[1]
Unit ofLias Group
UnderliesWhitby Mudstone Formation
OverliesDyrham Formation, Charmouth Mudstone Formation (East Midlands Shelf northwards)
| Marlstone Rock Formation | |
|---|---|
| Stratigraphic range: | |
| Type | Geological formation |
| Unit of | Lias Group |
| Underlies | Whitby Mudstone Formation |
| Overlies | Dyrham Formation, Charmouth Mudstone Formation (East Midlands Shelf northwards) |
| Thickness | 10 metres (33 ft) |
| Lithology | |
| Primary | Limestone, sandstone |
| Other | Mudstone, Ironstone |
| Location | |
| Country | United Kingdom |
| Extent | East Midlands Shelf and Worcester Basin (Mendips to Market Weighton). |
| Type section | |
| Location | Jeffries Brickworks, near Stonehouse |